As a procurement manager at a 200-person industrial fabrication company, I manage a materials budget of roughly $1.2 million a year. Over the last six years I have tracked every line item, and one of the most misunderstood spending decisions is how to specify fluoropolymers. The two options that cause the most confusion are Dupont Teflon coatings and Teflon sheeting. They sound similar. They are not the same. This article is a practical comparison from a total-cost point of view.

Why this comparison matters

Teflon is a brand name for polytetrafluoroethylene (PTFE), but the way you buy it changes the way it behaves. A coating is a thin layer—often 20 to 40 microns—applied to a substrate that carries the mechanical load. A sheeting is a solid piece of PTFE, from 0.5 mm to several millimeters thick, that you cut, machine, or fasten in place. One is a finish. The other is a material.

If your problem needs a nonstick surface, a coating is often enough. If your problem needs a barrier that is nonstick, you probably need sheeting.

Here is the framework I use when I compare the two. No need to overcomplicate it: surface chemistry, mechanical support, lifecycle cost, lead time. That is it. For any fluoropolymer order, I use a simple checklist: surface prep confirmed, thickness verified, lead time guaranteed. In that order.

Dimension 1: Total cost over two years

Let me give you a real quote set from Q3 2024. We needed 20 stainless steel rollers, 12 inches wide and 42 inches long, coated or sleeved. The coated route came to $380 per roller, including removal, grit blasting, and coating application. The sheeting route came to $610 per sleeve in raw Dupont Teflon sheeting, plus $180 in labor to machine each sleeve and press-fit it. That is $790 versus $380 before installation. One distributor I use, Spectrum Plastics Group, stocked the sheeting and helped source the board stock I discuss later.

What I mean by total cost is not the line item on the PO. It is the cost of downtime, the cost of a second coating if the first one wears through, the cost of extra material when a machinist scraps a piece, and the cost of a rush shipment when you misjudge the lead time. At least, that has been my experience with batches under 50 pieces.

The coating looked cheaper. It was cheaper—on the first order. But the sheet gives you a thicker wear layer. In abrasive service, a coating may only last one season; a 3 mm sheet can last several years. That flips the comparison.

Dimension 2: What actually fails

From the outside, a coated roller looks like the Teflon is doing everything. The reality is the surface prep below it does. If your metal part has sharp edges, poor blasting, or contamination before coating, the coating can fail in weeks. We had a bad batch once because the coating shop cut the grit blast step on a tight deadline. The coating looked perfect for about two weeks, then peeled off in strips.

Here is something vendors won't tell you about Teflon sheeting: PTFE creeps. If you clamp it in a fixture with a sustained load, it will slowly deform. And it expands about ten times more than steel with temperature changes. That means a precision part you cut to tolerance in the morning may be out of tolerance by the afternoon if your shop temperature changes. You have to design for that. Coatings don't creep because the substrate carries the load, but they can't give you thickness either.

Dimension 3: Lead time and the value of certainty

In May 2024, we had to replace release covers on three heated platens. The coating shop quoted a 10-day standard turnaround, or 5 days with a 25% rush premium. The sheeting supplier quoted 7 days, but that was an estimate—'probably Wednesday, maybe Friday.' I paid the rush premium. Total extra cost: $300. The alternative was a line shutdown worth about $2,300 in lost production each day. So glad we paid it. I almost went with the standard turnaround to save $300, which would have pushed the restart from Tuesday to the next Friday.

Does a rush fee always make sense? No. It makes sense when the cost of missing a deadline is higher than the premium. That is the time-certainty premium. In an emergency, a definite date is worth more than a low price with a maybe attached.

What About Polyurethane Foam Board and PVC Foam Board?

During the same material search, I had to look at lightweight board materials for a mockup and for a thermal break. This is where people get tangled up. Let's answer the basic question: what is PVC foam board? It is a rigid closed-cell foam made from polyvinyl chloride. It is dense enough to cut cleanly with regular woodworking tools, has decent moisture resistance, and is often used for tooling boards, signs, and fixtures. Polyurethane foam board is a different beast—lighter, a good insulator, and easier to cut with a hot wire, but it is more easily damaged by solvents and UV.

When I compared prices for 2-inch thick board stock in early 2024, the polyurethane foam board came in about 20% lower per board foot than PVC foam board. But the PVC board had better surface hardness and impact resistance. If a part needs to survive being handled, dinged, or exposed to moisture, I would pay the extra for PVC. If it is a low-cost pattern or an insulation layer, polyurethane is the better spend. Spectrum Plastics Group gave me one of the quotes, and they carried both boards, which simplified freight.

So Which One Do You Buy?

There is no single right answer. There is only the right answer for your application and your risk tolerance.

  • Choose Dupont Teflon coatings when you need a nonstick finish on an existing metal part, the part carries the load, and you can commit to surface prep.
  • Choose Teflon sheeting when you need a free-standing barrier, a thicker wear surface, or a machined component that won't be stressed beyond PTFE's limits.
  • Choose polyurethane foam board when weight and insulation matter more than impact and solvent resistance.
  • Choose PVC foam board when you need a rigid, moisture-resistant, easy-to-machine board for structural mockups or tooling.

Remember, the cheapest quote is not the cheapest part until you multiply it by the probability of failure, the cost of downtime, and the hassle of replacing it. I have learned that the hard way. If you take one thing from this article, compare the total cost over the life of the part, not just the unit price on the quote page.

Oh, and one more thing about coatings: if a coating shop tells you they can apply Teflon without grit blasting, be careful. Surface prep is not optional. It is the difference between a coating that lasts for years and one that fails the first time you clean it.